c++ 数字键盘设计（源码）

【实例截图】

【核心代码】

#include "keyboard.h"
#include "ui_keyboard.h"
#include <QtGui>
QString text[]={"1","2","3","4","5","6","7","8","9","."};
keyboard::keyboard(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::keyboard)
{
    ui->setupUi(this);
    signalMapper=new QSignalMapper(this);
    ui->lineEdit_window->setFocus();
    setMapper();
    connectMapper();
    connect(signalMapper,SIGNAL(mapped(const QString&)),this,SLOT(setDispText(const QString&)));
    connect(ui->pushButton_ok,SIGNAL(clicked()),this,SLOT(onEnter()));
    connect(ui->pushButton_12,SIGNAL(clicked()),this,SLOT(onBackspace()));
}

keyboard::~keyboard()
{
    delete ui;
}

void keyboard::setMapper()
{

  signalMapper->setMapping(ui->pushButton,ui->pushButton->text());
  signalMapper->setMapping(ui->pushButton_2,ui->pushButton_2->text());
  signalMapper->setMapping(ui->pushButton_3,ui->pushButton_3->text());
  signalMapper->setMapping(ui->pushButton_4,ui->pushButton_4->text());
  signalMapper->setMapping(ui->pushButton_5,ui->pushButton_5->text());
  signalMapper->setMapping(ui->pushButton_6,ui->pushButton_6->text());
  signalMapper->setMapping(ui->pushButton_7,ui->pushButton_7->text());
  signalMapper->setMapping(ui->pushButton_8,ui->pushButton_8->text());
  signalMapper->setMapping(ui->pushButton_9,ui->pushButton_9->text());
  signalMapper->setMapping(ui->pushButton_10,ui->pushButton_10->text());
  signalMapper->setMapping(ui->pushButton_11,ui->pushButton_11->text());


}

void keyboard::connectMapper()
{
 connect(ui->pushButton,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_2,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_3,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_4,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_5,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_6,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_7,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_8,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_9,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_10,SIGNAL(clicked()),signalMapper,SLOT(map()));
 connect(ui->pushButton_11,SIGNAL(clicked()),signalMapper,SLOT(map()));
}

void keyboard::setDispText(const QString& text)
{
//    if(waitingForOperand)
//    {
//        display->clear();
//        waitingForOperand = false;
//    }
   ui->lineEdit_window->insert(text);
}

void keyboard::onEnter()
{
    text =ui->lineEdit_window->text();
    emit setvalue(text);
    ui->lineEdit_window->clear();
    this->close();
}

void keyboard::onBackspace()
{
    ui->lineEdit_window->backspace();
}